Finding the Third Proportional to 64,488 and 99,648

Step by Step Solution

1. Step 1: Write the proportion equation
   64,488 : 99,648 = 99,648 : x
2. Step 2: Convert to fraction form
   64,488/99,648 = 99,648/x
3. Step 3: Cross multiply
   64,488x = 99,648 × 99,648
4. Step 4: Simplify right side
   64,488x = 9,929,723,904
5. Step 5: Solve for x
   x = 9,929,723,904/64,488
6. Step 6: Final answer
   x = 153,977.85